If you put it down on the ground and it's not moving then you didn't try hard enough or your engine is idling at too high an RPM. I have stopped the tires from moving with my foot against the side of the tire.

The tires are moving because of parasitic drag of the fluid between the clutches and steels, the fact that it doesn't drive away when you put it on the ground tells you it's a non issue ... unless you try to make it an issue and injure yourself ...